Amazon: Amazon.com is the global leader in e-commerce offering everything from books and electronics to tennis rackets and diamond jewelry.

Bizrate: Founded in 1996, BizRate.com is the largest, fastest and most accurate shopping search engine on the Web, with an index of over 30 million product offers from more than 40,000 stores.

eBay: Founded in 1995, eBay created a powerful platform for the sale of goods and services by a passionate community of individuals and businesses.

eBay Motors: eBay Motors is the Internet's largest auction-style marketplace for buying and selling all things automotive.

eBay Stores: eBay Stores expands the marketplace for sellers by allowing them to create customized shopping destinations to merchandise their items on eBay.

Froogle: Applies the power of Google's search technology to a very specific task: locating stores that sell the item you want to find and pointing you directly to the place where you can make a purchase.

MySimon: A comparison shopping service for products and services. They search thousands of merchants and list millions of products so that their consumers can compare selections before making a purchase from one of their online merchants.

Overstock: Overstock.com Auctions is an online community of auction buyers and sellers connected through their personal and business networks. It offers 30% lower fees, volume discounts and a simple listing process for sellers; for buyers, it provides a trusted community of auction users.

Pricegrabber: The industry innovator in online comparison shopping. Millions of consumers use PriceGrabber to quickly obtain free and unbiased information about products, services, merchants and sellers before making a purchase decision.

Shopping.com: A leading online comparison shopping service. We gather product and merchant data from across the Internet, organize and structure it into a comprehensive catalog, and present the resulting information to consumers in a user-friendly interface at our flagship destination, www.shopping.com, and our consumer reviews website, www.epinions.com.

Yahoo Shopping: Finding the right product at the right price is the goal of online shoppers, and Yahoo! Shopping empowers the consumer to easily compare product prices and features across thousands of merchants.